The invention discloses a non-pneumatic tire
topological optimization method based on
isogeometric analysis in the technical field of wheel design, and aims to solve the problems of low analysis precision and low solving speed due to the fact that finite
element analysis is generally adopted for optimization work in the prior art. The method comprises the following steps: performing parametric modeling on a non-pneumatic tire based on an NURBS curve to obtain a parametric model, performing grid division on the parametric model, obtaining units, a
design domain and a structure model, dividing the units into multiple types of units under a fixed
equidistant geometric background grid, and introducing boundary conditions under different working conditions based on the parametric model and the multiple types of units to obtain a
design domain of the non-pneumatic tire. Analyzing the
stress distribution and the displacement vector of the non-pneumatic tire to obtain a
stress distribution matrix; according to the method, the situation that a straight
line segment and an arc are discontinuous in traditional finite
element analysis is overcome, the
topological optimization precision is improved, the calculation time is shortened, the service life of the non-pneumatic tire is prolonged, the performance of the non-pneumatic tire is improved, and meanwhile the working efficiency of structural design optimization is guaranteed.